Key words and definitions Wind: air in natural motion, as that moving horizontally at any speed along the earth’s surface.
Erosion:the process by which the surface of the earth is worn away by the action of water, ice, wind and water.
Weathering: the processes that cause exposed rock to decompose.
Dune: a hill or ridge of wind-blown sand.
Bedrock:unbroken solid rock, overlaid in most places by soil or rock.
Glacier:an extended mass of ice formed from snow falling and accumulating over the years and moving very slowly, either descending from high mountains, as in valley glaciers, or moving outward from centres of accumulation, as in continental glaciers.
Earthquake:a sudden release of energy in the earth's crust or upper mantle, usually caused by movement along a fault plane or by volcanic activity and resulting in generating seismic waves which can be destructive.
Volcanoes: a vent in the earth's crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals.
Tsunamis: an unusually large sea wave produced by an underwater earthquake or undersea volcanic eruption and often causes extreme destruction when it strikes land.
Drought: a prolonged period of abnormally low rainfall, lasting up to several years.
Wind: air in natural motion, as that moving horizontally at any speed along the earth’s surface.
Erosion: the process by which the surface of the earth is worn away by the action of water, ice, wind and water.
Weathering: the processes that cause exposed rock to decompose.
Dune: a hill or ridge of wind-blown sand.
Bedrock: unbroken solid rock, overlaid in most places by soil or rock.
Glacier: an extended mass of ice formed from snow falling and accumulating over the years and moving very slowly, either descending from high mountains, as in valley glaciers, or moving outward from centres of accumulation, as in continental glaciers.
Earthquake: a sudden release of energy in the earth's crust or upper mantle, usually caused by movement along a fault plane or by volcanic activity and resulting in generating seismic waves which can be destructive.
Volcanoes: a vent in the earth's crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals.
Tsunamis: an unusually large sea wave produced by an underwater earthquake or undersea volcanic eruption and often causes extreme destruction when it strikes land.
Drought: a prolonged period of abnormally low rainfall, lasting up to several years.
Definitions from: http://dictionary.reference.com/